[Dovecot] cram-md5 and users maintaining their own passwords?

Is there any other mechanism than using passwd files with md5-hashed passwords created by dovecotpw that will support cram-md5 authentication?

Has anyone created setups where the passwd databases reside in the individual users home directories?

Is it possible to persuade dovecotpw to update the passwd databases automatically. Having to use a text editor to paste in the passwords sets a high user treshold on using the cram-md5 authentication mechanism.

Thanx!

• Steinar